Question

Define current ratio α and β for transistor. Obtain the relation between them.

Answer 1

The relationship between alpha and beta refers to a bipolar transistor. Alpha, αα, is the ratio of collector current to emitter current and is usually close to one. Beta, ββ, is the ratio of collector current to base current and is usually a large number (50 - 1000). Because emitter current is the sum of collector current and base current one can derive a relationship between alpha and beta:

β=α/(1−α)

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